#vulnerability

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-528q-4pgm-wvg2. This link is maintained to preserve external references. ### Original Description A cross-site scripting (XSS) vulnerability in mccutchen httpbin v2.17.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

SignalK Server exposes two features that can be chained together to steal JWT authentication tokens without any prior authentication. The attack combines WebSocket-based request enumeration with unauthenticated polling of access request status. **Unauthenticated WebSocket Request Enumeration**: When a WebSocket client connects to the SignalK stream endpoint with the `serverevents=all` query parameter, the server sends all cached server events including `ACCESS_REQUEST` events that contain details about pending access requests. The `startServerEvents` function iterates over `app.lastServerEvents` and writes each cached event to any connected client without verifying authorization level. Since WebSocket connections are allowed for readonly users (which includes unauthenticated users when `allow_readonly` is true), attackers receive these events containing request IDs, client identifiers, descriptions, requested permissions, and IP addresses. **Unauthenticated Token Polling**: The acces...

The SignalK access request system has two related features that when combined by themselves and with the infromation disclosure vulnerability enable convincing social engineering attacks against administrators. When a device creates an access request, it specifies three fields: `clientId`, `description`, and `permissions`. The SignalK admin UI displays the `description` field prominently to the administrator when showing pending requests, but the actual `permissions` field (which determines the access level granted) is less visible or displayed separately. This allows an attacker to request `admin` permissions while providing a description that suggests readonly access. The access request handler trusts the `X-Forwarded-For` HTTP header without validation to determine the client's IP address. This header is intended to preserve the original client IP when requests pass through reverse proxies, but when trusted unconditionally, it allows attackers to spoof their IP address. The spoofe...

The SignalK appstore interface allows administrators to install npm packages through a REST API endpoint. While the endpoint validates that the package name exists in the npm registry as a known plugin or webapp, the version parameter accepts arbitrary npm version specifiers including URLs. npm supports installing packages from git repositories, GitHub shorthand syntax, and HTTP/HTTPS URLs pointing to tarballs. When npm installs a package, it can automatically execute any `postinstall` script defined in `package.json`, enabling arbitrary code execution. The vulnerability exists because npm's version specifier syntax is extremely flexible, and the SignalK code passes the version parameter directly to npm without sanitization. An attacker with admin access can install a package from an attacker-controlled source containing a malicious `postinstall` script. ### Affected Code **File**: `src/interfaces/appstore.js` (lines 46-76) ```javascript app.post( [ `${SERVERROUTESPREFIX}/app...

[Note] This is a separate issue from the RCE vulnerability (State Pollution) currently being patched. While related to tokensecurity.js, it involves different endpoints and risks. ### Summary An unauthenticated information disclosure vulnerability allows any user to retrieve sensitive system information, including the full SignalK data schema, connected serial devices, and installed analyzer tools. This exposure facilitates reconnaissance for further attacks. ### Details The vulnerability stems from the fact that several sensitive API endpoints are not included in the authentication middleware's protection list in `src/tokensecurity.js`. **Vulnerable Code Analysis:** 1. **Missing Protection**: The `tokensecurity.js` file defines an array of paths that require authentication. However, the following paths defined in `src/serverroutes.ts` are missing from this list: - `/skServer/serialports` - `/skServer/availablePaths` - `/skServer/hasAnalyzer` 2. **Unrestricted Access*...

### Summary A Denial of Service (DoS) vulnerability allows an unauthenticated attacker to crash the SignalK Server by flooding the access request endpoint (`/signalk/v1/access/requests`). This causes a "JavaScript heap out of memory" error due to unbounded in-memory storage of request objects. ### Details The vulnerability is caused by a lack of rate limiting and improper memory management for incoming access requests. **Vulnerable Code Analysis:** 1. **In-Memory Storage**: In `src/requestResponse.js`, requests are stored in a simple JavaScript object: ```javascript const requests = {} ``` 2. **Unbounded Growth**: The `createRequest` function adds new requests to this object without checking the current size or count of existing requests. 3. **Infrequent Pruning**: The `pruneRequests` function, which removes old requests, runs only once every **15 minutes** (`pruneIntervalRate`). 4. **No Rate Limiting**: The endpoint `/signalk/v1/access/requests` accepts POST requests...

### Summary An unauthenticated attacker can pollute the internal state (`restoreFilePath`) of the server via the `/skServer/validateBackup` endpoint. This allows the attacker to hijack the administrator's "Restore" functionality to overwrite critical server configuration files (e.g., `security.json`, `package.json`), leading to account takeover and Remote Code Execution (RCE). ### Details The vulnerability is caused by the use of a module-level global variable `restoreFilePath` in `src/serverroutes.ts`, which is shared across all requests. **Vulnerable Code Analysis:** 1. **Global State**: `restoreFilePath` is defined at the top level of the module. ```typescript // src/serverroutes.ts let restoreFilePath: string ``` 2. **Unauthenticated State Pollution**: The `/skServer/validateBackup` endpoint updates this variable. Crucially, this endpoint **lacks authentication middleware**, allowing any user to access it. ```typescript app.post(`${SERVERROUTESPREFIX}/va...

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A user with a legitimate non-administrator account can exploit a vulnerability in the user ID creation mechanism in Apache StreamPipes that allows them to swap the username of an existing user with that of an administrator.  This vulnerability allows an attacker to gain administrative control over the application by manipulating JWT tokens, which can lead to data tampering, unauthorized access and other security issues. This issue affects Apache StreamPipes: through 0.97.0. Users are recommended to upgrade to version 0.98.0, which fixes the issue.